Evolutional rule of wear trace wavelength and wavehollow from calculation of boundary layer parameter are deduced. A new thread of researches in erosion wear is provided.
通过对边界层参数的计算推论磨痕波长和波深演变规律，提出了冲蚀磨损机理新的研究思路。
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The greater the amplitude change of head wave of transverse velocity is, the severer the damage is, the later the arriving time of the first wavehollow and the longer the damaged element will be.
The paper illustrates the characteristics of hollow optical fiber in detail and uses the concept of evanescent wave to explain the beam transmission in interface of hollow and core.